Question

of alkenes is an explosive reaction.
It takes places as follows (X represents the halogen atom): ${\mathrm{CH}}_2={\mathrm{CH}}_2+$$\stackrel{{\mathrm{CCl}}_4}{\to }$${\mathrm{CH}}_{2}X-{\mathrm{CH}}_{2}X$

• A. $F_2$
• B. ${\mathrm{Cl}}_2$
• C. ${\mathrm{Br}}_2$
• D. Fluorination
• E. Bromination
• F. Chlorination

Answer 1

Answer: (A), (D)

The correct options are
A $F_2$
D Fluorination

Chain propagation step is extremely exothermic in case of fluorination. The heat generated cannot be eliminated from the reaction mixture quickly enough; thus, the reaction rate steadily increases, adding even more heat. As a result, an explosion occurs.